I Run Because....

I saw these giant chalkboards outside of Lululemon in San Francisco that encouraged people walking by to fill in the following statement "I run because...".  Some of the answers that people came up with cracked me up.  The ones I can most relate to are "It clears my mind", "It makes everything better", and "I'll go crazy if I don't".  When I started out running I would definitely have agreed with the person who wrote "because my mom makes me!". Now I run because it makes me feel fabulous!  What inspires you to exercise?